[Isometric Tilemap Z as Y][Camera][Mouse] Correct way of handling mouse events

Hello good people,

I'm developing isometric game, basing on Unity tutorials and my personal experience.
Right now I'd like to handle Mouse Events on my Isometric Tilemap Z as Y.

Idea is very simple, whenever mouse is over tilemap, get cursor position and paint given tile red. Sounds very simple, but I've encountered a major problem. There is no way of getting correct coordinates.

I tried this code in Tilemap's OnMouseOver method:

Code (CSharp):

1.  
2.         var clickPoint = Camera.main.ScreenToWorldPoint(Input.mousePosition);
3.  
4.         var localPoint = tileMap.LocalToCell(clickPoint);
5.  
6.         if (tileMap.HasTile(localPoint))
7.         {
8.             Debug.Log("Tilemap has tile");
9.         }
10.  

I'm unable to retrive any tile.

The first issue is localPoint.z always set to -10. So I created tile position to tile height map which also didnt help much - it seems all points are shifted in x and y axis.

Here is how my Isometric Tilemap Z as Y looks like:


Tiles have different z values (1 step is z+1).

Do you guys have some valid ways of handling mouse events on Isometric Tilemap Z as Y?
I'd realy appreceate some help.